... when two packages are installed.

(fc35 with i686 and x86_64 packages of libsepol installed).
$ rpm -q --qf "%{VERSION}" libsepol
3.33.3

Restricting the version to the current achitecture generates
a much more obtainable version dependency.

$ rpm -q --qf "%{VERSION}" libsepol.x86_64
3.3

This make dependency resolution easier preventing:
$ sudo dnf localinstall  MariaDB-server-10.8.0-1.fc35.x86_64.rpm ...
Last metadata expiration check: 2:06:49 ago on Thu 30 Dec 2021 14:02:32.
Error:
 Problem 1: conflicting requests
  - nothing provides libsepol >= 3.33.3 needed by MariaDB-server-10.8.0-1.fc35.x86_64

The CMAKE_SYSTEM_PROCESSOR is used in the generation of architecture
filenames so its preduent to just use the same version.